Don't use a strip-type thermometer, which you hold on your baby's forehead, to check your baby's temperature. Strip thermometers only show the temperature of your baby's skin, not her body. It's also best not to use an old-fashioned, mercury-in-glass thermometer.
If your prawns are smaller, spread a piece of aluminum foil or banana leaf on the grill first, then place prawns on top. Or skewer the shrimp with satay sticks (if wood, soak in water first). Baste the prawns the first time you turn them with a little of the leftover sauce. Grill 3 to 5 minutes each side. Prawns are done when the flesh turns from translucent to pinkish-white (and the shells turn a very attractive bright pink).
(If using wood skewers, soak them in water for 10 minutes beforehand.) In a small bowl, combine the butter and garlic. Brush the shrimp with the garlic butter. Place the shrimp on grill with the limes. Cook for about 4 minutes on each side or until the shrimp are opaque and the limes are browned. Remove from grill.